Novobeam NBP3000-2P Ultra-Compact Waterproof / Dustproof Portable USB External Battery Pack Charger / Power Bank, 3,000 mAh, Compatible with most Smartphones and other USB Powered Devices, 2-Pack High-capacity Lithium rechargeable & portable battery pack with a full power capacity of 3,000 mAh, enough to fully charge Apple iPhone 5s / 5 / 4 / 4s / 3G / 3Gs and other smartphones, more than once Ultra-compact & ultra-light design with a weight of less than 3 oz and measurements of only 4 X 1 X 1 inches, comparable to the size of a roll of mints, fits easily in a shirt pocket or a purse Built with unique Push-n-Seal technology ensures water-proof and dust-proof, ideal for both indoors and outdoors Virtually compatible with all smartphones including but not limited to the ones made by Apple,Galaxy S5, S4, S3, Note 3, Nexus 4, HTC One, One 2 (M8), Nokia Lumia 520, 1020 Package includes Novobeam NBP3000 external battery pack, micro USB charging cable and instruction sheet, 18-month manufacturers warranty